Auto-Level Mounts for Ender 3, CR-10, Tevo, etc.

thingiverse

This is a step-by-step guide for setting up and calibrating a Z-probe on a 3D printer. Here's the rewritten version with improved formatting and clarity: **Connecting the Z-Probe** 1. Connect the Vcc (typically brown) wire to the positive terminal of your power source. 2. Connect the Ground (typically blue) wire to the ground (-) of your power source. 3. Connect the Signal (typically black) wire to the diode side with the black stripe. The other end of the diode goes to the signal pin of your controller's Z-end stop connector. **Checking Your Work** 1. Before connecting the signal wire to your controller, power up and check the amperage at the end of the diode going to the signal pin. It should be 0. 2. If not, you wired it backwards or the diode is shorted. 3. Set your multimeter to DC Volts and check the voltage at the signal pin. You might see 24V or 12V (voltage will be equal to the power source used to drive the sensor). 4. This is normal and expected. The diode stops current (amps) not voltage from flowing to the sensor pin, thereby protecting your board. **Sensor Offsets** 1. Set the probe's physical distance from the nozzle in Marlin so that it knows where the probe is. 2. Set the X & Y offsets according to your probe: * SN04: -40.6, -7.5 * BL Touch: -40.2, -11.5 * M8: -40.2, -3.5 **Determining the Z Offset** 1. The final and MOST CRITICAL step is to determine the Z offset. 2. For some reason, this step seems to confuse people the most. 3. There are a multitude of ways to do this, but some tutorials are overly complicated or even incorrect. 4. You do not need to heat the bed for the offset calculation. **Calculating the Z Offset** 1. From the terminal of your choice (pronterface, S3D, etc.), connect to your board and send the following G-Codes: * M851 Z0 - Makes sure offset is clear * G28 - Home * G1 Z0 - to make sure head is at true 0 * M211 S0 - Disable software endstops 2. From the LCD, go to prepare, move Z axis, .1mm. 3. Use a piece of paper to adjust height by lowering head (turn knob left). 4. When the proper height is achieved, read the number on the display. We will use -.8 for this example. 5. If your value is higher than 1.2, lower your sensor a little and restart. **Saving and Loading the Z Offset** 1. M851 Z-.8 - Set the Z offset 2. M500 to save 3. M501 to load 4. M211 S1 - Restore software endstops **Final Check** 1. G28 - Home printer 2. G1 Z0 3. Now test your paper again. You are done!